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1931- o. w. HAMMERQUIST 1,

GRIPPER REST AND CLAMPING BAR Filed Feb. 8, 1928 the cylinder.

Patented Feb. 3, 1931 UNITED. STATES PATEN LOFFICEV'Q,

oscAn w. Z H.'AMMERQUIST, or scc. PAUL, mmnnsora, nssrenoa o :enown & VBIGELIO'W;

orsm. PAUL, MINNESOTA, A CORPORATION on MINNESOTA GRIPIEER BEST AND CLAMPING-BAR Application 1 1a February S, 1928. Serial nmasasoi.

My" invention resides inan adjustable clamp and gripperrest which is adapted to be adjustedradially of the-blanket cylinder. This permits the clamp to be set so that the gripping fingers are below the surface of the blanket and positioned so that they will not contact with the copper cylinder, yet being close enough to the surface toproperly hold and engage thesheet firmly in operation of It isalso a feature of my invention to provide a transverse clamping member having the topsurface against which the ends of the gripping fingers engage slightly tapered or bevelled-off at'the same angle as the top of the tympan clamp. I provide a slot on each end of the tympan clamp which is centered and controlled by an eccentric stud which can be turned and locked in any position to suit the height of theclamp.

It is also a feature of my invention to provide a spanner wrench lock nut for the end of the eccentric stud, and in addition I provide a nut and washer locking means at the side of the cylinder which is tightened up against the spanner wrench nut to insure holding the same against displacement in the cylinder. This is an important means of carrying out the principal features of my invent-ion.

It is also a feature of my invention to pro- Vide the eccentric studs for the clamp which form a pivot to hold the clamp in proper position when released. This also provides the radial adjustment of the clamp and griping rest, when the blanket is released, and or changing or adjusting of the same. By this means the operatorof the cylinder may be assuredthat the clamp will come back into the proper position to which it had been set. Thus the height of the clamp can be maintained in the same relative position to the gripper and the outer surface of thecylinder.

One of the primary advantages of this in- Vention resides in the adjustment of theclamp.

and gripper rest together with theouter bevelled face against which the gripper fingers rest and upon which the paper is engaged by the gripper fingers. The bevelling of the outer' surfaceiof the clamp is just at a slight angle sufficient topermit the engaging ends of the gripper fingers to engage the edge of the. paper held on the blanket, and yet havin the engaging ends of the fingers below the tangential surface of'the blanket cylinder and the copper cylinder, operatedwith theblanket cylinder so that the grippers will not hit the copper cylinder. This is very important and my adjustable clamp and grip perrest -is easily and quicklyadjustableso that the fingers will not engage with the copper cylinder. j 1

' These objects will be more clearly set forth,

together with other details of theinvention,

in the specification and claims.

In the drawings forming part of the specification Figure I is a diagrammatic sectional detail of the transfer and blanket cylinder showing the printing-press.

Figure 2 is a detailof an the blanket cylinder.

Figure 3 is a section of a portion of the blanket cylinder through the lines 33 of Figure 1, the tympan clamp and rest being removed, and: showing primarily the eccentric stud for ing bar. v Y

F igure4 is aview on the lines 4 4 in the direction of the arrows in Figure? Figure 5 is a diagrammatic detail of a portion of the clamping bar and gripping fingers.

Figure 6 is Figure 5. r v r {My invention residesmore particularly in means for holding the clamp which is adapt-v end portion of a section onthe line s 66 ed to engage for holding'thej end of the pivotally mounting the clampca'lly only a portion of the blanket cylinder v A and the transfer cylinder B. The portion which I have illustrated is that particular part of each of these-cylinders where the clamp is held, and where the gripping fingers for the sheet are supported on'the transfer cylinder. I

The drawings illustrate a portion of the blanket cylinder A having a recess-portion V which bear against the washer members 8, V to clamp the bar 3 tightly against the end 4 of the blanket.

The outer end 9 of the clampingbar3l is bevelled off, the pu'rpose'of which will be hereafter more fully described. The bar 3 is termed a tympan clamp and is adapted to be pivotally supported by the'eccentricstud 10. The eccentric stud or pin 10 is mounted in the ends of the cylinder A and the mounting of the same ismore clearly illustratedin Figure 3. This pin is formed with a shank 11 which is threaded at 12 and is adapted to be engaged by the spanner nut 13 to lock the pin 10 in a set position. The pin 10 is formed with a socket 14 for a wrench so that it can be rotated on its shankll. A suitable shoulder 15 is formed on the inner end of the shank 11 and projecting from this shoulder is the bearing stud which is positioned offset from the axisof the shank 11 so that when the cocentric stud 10 is rotated the position of the bearing studportion 16 is changed.

An auxiliary locking means is provided for locking the eccentric stud 10 by means of the set screw 17 and the washer 18 which are adapted to engage against the spanner nut 13to hold the'same against movement after has been set.

The clamp 3 is formed with a bifurcated end 20 on the inner portion of the ends of the same, which is adaptedto engage with the bearing stud 16 of the pin 10 and thus the clamping bar 3 is held pivotally supported to the cylinder A and is adapted to be adjusted sofas to move the surface 9 intoproper adjustment with the periferyof the cylinder A. When the bar 3 is adjusted into the desired position by the eccentric stud" 10 and the stud is locked into rigid position, the clampingba'r 3 may be dis-engaged from the end 4 of the blanket 5 by loosening the screws 6 to adjust the blanket and can be again clamped against the blanket without changing the pivotal position through the bearing stud portion 16 which holds the clamping bar 3 in proper adjusted position in the cylinder A.

The cylinder A is provided with sheet gripping fingers 2 2 which are adapted to rest against the bevelled surface 9 of the clamping bar 3 and by means of the adjustment of the clamping bar 3, the free ends of these fingers are placed below the surface 23 of the transfer cylinder B so that the surface of this cylinder will not be injured in passing the fingers 22, yet permitting the fingers 22 to be closely'associated to the surface 23 of the cylinder B, and permitting the sheet to "the ends of the sheets and permitting the same to lie practically flat with the respective cylinders.

The gripping fingers 24-are adapted to engageagainst the bar 25 which is adjustably held by the set screws 26 in relation to the bar 3J1The outer surface 27 of the'bar 25is bevelled in a' manner to coincide with the bevelled surface 9 of the bar 3. The bar 25 is cut away at 28 so as to receive the free ends 1290f the fingersl24 as the gripping fingers'22 and2et pass each other in the rotation of the cylinders A and'B of the printingpress.

My means of adjustably holding'thebar 3 accomplishes the new result in transferring the sheets from one cylinder to the other in a very effective manner and permitting-the fine'adjustment of the surface'9 to thesurface 23 of the cylinder B without danger of the bar'3 injuring the surface of the cylinder B. Further, my mounting of the clamping bar 3 by means of the eccentric stud bearingspermits the bar to be always replaced'in' the same position. This is a material saving of time to the press operator,-to say nothing of'the assurety that thecylinder B will not be injured. I have found my device to be very practical and'of a highly desirable nature. t

In-accordanee with the patentstatutes I havedcscribed the principles of operation of myadjustable clamp and g pp Test, and

while I have illustrated a part formation of the same in diagrammatic illustrations in the drawings, I desire to have it understood that the invention can be carried out by other means within the scope of the-following claims, without departing from the spirit of my invention. v 1

- I claim:

' 1. An adjustable clamp and gripperrest for printing cylinders including a clamping bar, abevell'ed edge for-med on the-clamping bar, eccentrically positioned bearing members adapted to hold said bar adjustable radially in the press cylinder, and abifurcated end formed on said bar to removably connect the same with said bearing member.

I 2. An adjustable gripper rest including a clampingbar andmeans for pivotally supporting said bar radially adjustableand. removable Without changing said means for supporting said bar.

3. An adjustable clamp' andv gripper for printing presses comprising a bar adapted to form a rest for gripping fingers, means-for pivotally and adjustably supporting said bar in a manner to permit said bar to be adjusted Lhi cylinders.

5. A blanket clamp and sheet engaging means for printing presses includinga series of gripping fingers mounted on two adjacent cylinders, finger rest bars on each of said cylinders and outer coinciding surfaces formed on said bars to permit the same to coincide Without contact and to transfer the sheet from one cylinder to the other as the cylinders rotate in unison.

6. A sheet transfer and gripping means including a pairof printing cylinders adapted to rotate in unison, gripping fingers carried by each of said cylinders, rest bars for the free ends of said fingers, coinciding bevelled edges on said bars, and means for holding one of said bars radially adjustable.

7. An adjustable clamp and gripper rest including a clamping bar extending longitudinally of a printing cylinder, means for clamping said bar to adjustably engage the rubber blanket, and eccentric studs forysupporting said bar radially adjustable, said bar forming a rest for the 'free ends of the gripping fingers carried by said cylinder and a slotted inner edge on said bar formed to engage said studs.

8. A clamping bar and gripper rest for printing press cylinders including a supporting stud for said bar adapted to adjust the bar radially in said printing cylinder, means for holding said studs adjusted to a set position, and means formed in said bar to engage said studs to permit the bar to be removed Without changing the adjustment of the studs.

OSCAR W. HAMMERQUIST. 

